Build a Giant 2,500-LED Wall on a Budget - Hackster.iohttps://www.hackster.io/news/build-a-giant-2-500-led-wall-on-a-budget-ebcb2cbd4e76

• Led
• Strip
• Wall

• Led
• Strip
• Wall

Chris Maher made a massive, wall-sized 2,500-LED matrix without breaking the bank using an ingenious design powered by LED strips.

Check Out This 7-Segment Display That Runs on Air - Hackster.iohttps://www.hackster.io/news/check-out-this-7-segment-display-that-runs-on-air-8562ef9e05e3

• Clock
• Vacuum

• Clock
• Vacuum

This air-powered 7-segment display uses pneumatic "transistors" and vacuum pressure to physically transform the segments.

Painting the Time on Flip Sequins - Hackster.iohttps://www.hackster.io/news/painting-the-time-on-flip-sequins-d57d924a2967

• Clock
• Sequin

• Clock
• Sequin

Sequino is a robotic clock that swaps pixels for flip sequins, using an H-bot system to "paint" the time on a shimmering canvas.

Implementing PCIe Over Fiber Using SFP Modules | Hackadayhttps://hackaday.com/2026/04/11/implementing-pcie-over-fiber-using-sfp-modules/

• Pcie
• Sfp

• Pcie
• Sfp

Although we can already buy commercial transceiver solutions that allow us to use PCIe devices like GPUs outside of a PC, these use an encapsulating protocol like Thunderbolt rather than straight P…

This $15 Breadboard Upgrade Makes Life Easier - Hackster.iohttps://www.hackster.io/news/this-15-breadboard-upgrade-makes-life-easier-aa2ffa6e96c2

• Power
• Usb-c

• Power
• Usb-c

Power your breadboard anywhere with the BrødBoost-C2, a tiny, USB-C powered regulator delivering clean 3.3V/5V power for just $14.99.

Easily Add Texture to Your 3D Prints with the Free BumpMesh Web Tool - Hackster.iohttps://www.hackster.io/news/easily-add-texture-to-your-3d-prints-with-the-free-bumpmesh-web-tool-c25191dc844c

• 3dprint
• Texture

• 3dprint
• Texture

Stefan from CNC Kitchen created the BumpMesh web tool to make 3D model texturing super easy.

Turning Dollar-Store Foam Into a High-Tech FPV Plane - Hackster.iohttps://www.hackster.io/news/turning-dollar-store-foam-into-a-high-tech-fpv-plane-bb837c14dff6

• Airplane

• Airplane

With just a few basic components like a Seeed Studio XIAO ESP32S3, you can turn a $2 toy glider into a high-tech FPV airplane.

Playful ‘Space Dice’ Kit Shows Off Clever Design | Hackadayhttps://hackaday.com/2026/03/28/playful-space-dice-kit-shows-off-clever-design/

• Synth
• 3dprint

• Synth
• 3dprint

[Tommy] at Oskitone has been making hardware synth kits for years, and his designs are always worth checking out. His newest offering Space Dice is an educational kit that is a combination vintage …

Add Laser Engraving to Your Desk for Just $64 - Hackster.iohttps://www.hackster.io/news/add-laser-engraving-to-your-desk-for-just-64-92e7312e464e

• Laser

• Laser

Build your own mini laser engraver for $64! This ATmega328-powered project burns detailed designs into wood, leather, and paper.

The Insane Engineering Behind a DIY Real-Time Spray Paint Mixer - Hackster.iohttps://www.hackster.io/news/the-insane-engineering-behind-a-diy-real-time-spray-paint-mixer-b6dfbad35568

• Paint

• Paint

Sandesh Manik wanted a kind of real-time color-mixing system for spray paint and bringing that to life required some insane engineering.

Build This Open-Source Graphics Calculator | Hackadayhttps://hackaday.com/2026/03/23/build-this-open-source-graphics-calculator/

• Calculator
• Esp32

• Calculator
• Esp32

Graphics calculators are one of those strange technological cul-de-sacs. They rely on outdated technology and should not be nearly as expensive as they are, but market effects somehow keep prices w…

The 3DFX Voodoo Lives Again In An FPGA | Hackadayhttps://hackaday.com/2026/03/22/the-3dfx-voodoo-lives-again-in-an-fpga/

• FPGA
• 3d

• FPGA
• 3d

The 3DFX Voodoo was not the first dedicated 3D graphics chipset by any means, but it became the favourite for gamers among the early mass-market GPUs. It would be found on a 3D-processing-only PCI …

How I 3D Printed My Own Lego-Compatible Train Bridges | Hackadayhttps://hackaday.com/2026/03/16/how-i-3d-printed-my-own-lego-compatible-train-bridges/

• Lego
• Railway
• 3dprint

• Lego
• Railway
• 3dprint

Lego train sets have been available for decades, now. The Danish manufacturer long ago realized the magic of combining its building block sets with motors and plastic rails to create real working r…

This Printed Zipper Repair Requires No Unsewing | Hackadayhttps://hackaday.com/2026/03/14/this-printed-zipper-repair-requires-no-unsewing/

• 3dprint
• Zipper

• 3dprint
• Zipper

If a zipper breaks, a 3D printer might not be the first tool one reaches for — but it’s more feasible than one might think. [MisterJ]’s zipper slider replacement is the kind of 3D…

3D Printing A Harmonic Pin-Ring Gearing Drive | Hackadayhttps://hackaday.com/2026/03/11/3d-printing-a-harmonic-pin-ring-gearing-drive/

• 3dprint

• 3dprint

Cycloidal drives are a type of speed reducer that are significantly more compact than gearboxes, but they still come with a fair number of components. In comparison, the harmonic pin-ring drive tha…

A Rotary Dial The 3D Printed Way | Hackadayhttps://hackaday.com/2026/03/11/a-rotary-dial-the-3d-printed-way/

• 3dprint
• Dual

• 3dprint
• Dual

There’s a meme which may have a basis in truth, of a teenager left clueless when presented with a rotary telephone. The dial, in reality a mechanical pulse chain generator, was once ubiquitou…

Boom Boy Is the Answer to “What If Nintendo Made a Boombox?” - Hackster.iohttps://www.hackster.io/news/boom-boy-is-the-answer-to-what-if-nintendo-made-a-boombox-0f8f3f95e70d

• Music

• Music

What if Nintendo had made boomboxes instead of consoles? It might have looked something like this Boom Boy.

The Ultimate Productivity Killer: Doom Arrives on the Office Desk Phone - Hackster.iohttps://www.hackster.io/news/the-ultimate-productivity-killer-doom-arrives-on-the-office-desk-phone-4b95e50a577b

• Doom
• phone

• Doom
• phone

From corporate calls to Cacodemons: a hardware hacker turned a 20-year-old VoIP office phone into a playable Doom machine.

GitHub - shufps/diy-projector-clock: DIY Projector Clockhttps://github.com/shufps/diy-projector-clock

• Clock
• Led
• Projector

• Clock
• Led
• Projector

DIY Projector Clock. Contribute to shufps/diy-projector-clock development by creating an account on GitHub.

A Projection Clock You Can Actually See During the Day - Hackster.iohttps://www.hackster.io/news/a-projection-clock-you-can-actually-see-during-the-day-93367d0570cf

• Les
• Projector
• Clock

• Les
• Projector
• Clock

Frixos is a high-power ESP32 projection clock that stays crystal clear in daylight and syncs with Home Assistant to track your entire life.